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Low CYA in INTEX pool

I added 1 lb of CYA using the sock method.everything has desolved since monday but i can't get a reading of the CYA.

Before i put the CYA in the sock i read on the bucket to add 30 ppm of CYA in a 4440 gallons add 1lb so i did that but now when i put in 1lb of CYA in the pool calculator it says that will only bring my CYA to 12 ppm.

So should i add more CYA or just leave it alone for a week and check it then?

FC:2.5
Ph:7.4
TA:90
CH:40
CYA :12 according to the pool calculator/also just tested it well below 30 ppm

Re: Low CYA in INTEX pool

Trust poolcalculator. If you think you added half of what you need, and after 5 days you still see almost nothing, I'd venture to say you need to add another pound. Then you can see if that puts you around 25 and adjust from there.

Re: Low CYA in INTEX pool

So after a few days of last checking the CYA tomorrow i'm gonna check it.but according to the pool calculator i have added 1lb of CYA so that will give me 27 ppm and also added 2x3" trichlor tablet so in total i should have a CYA of 42ppm.

Extra: i have a leak so today i had to add like 2" of water just to get the water to mid skimmer level,so if tomorrow the CYA level is at 42 i should just leave it right?